The Sierra Designs DriDown Capiz Jacket uses regular down treated with a hydrophobic finish on each individual plume, resulting in down that stays dry 10 times longer, dries 33 percent faster and keeps warmer than the untreated stuff.

The warmth of a down jacket is challenged by the fact that the world doesn't stay perfectly dry. When faced with a rainstorm or extended snow exposure, that warm down morphs into cold, wet feathers. The Sierra Designs DriDown Capiz Jacket uses regular down treated with a hydrophobic polymer finish on each individual plume, resulting in down that stays dry 10 times longer, dries 33 percent faster and keeps warmer than the untreated stuff. The polyester rip-stop shell is also DWR treated, to help protect against moisture. Stretch side panels running through the arms allow for increased mobility, and the slim fit keeps the jacket from getting in your way when out on an adventure.

What we liked: The amount of 600-fill DriDown was enough to keep me warm in cold conditions, and yet the 10.5-ounce jacket packed down into a tight little bundle in my suitcase.

Not so much: The two zippered hand pockets are plenty big to keep your hands warm, but it would be nice to add an interior security pocket for a cell phone or money, so your hands don't have to compete for space.